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| author | yangbo lu <yangbo.lu@freescale.com> | 2015-10-16 15:44:03 +0800 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2015-10-26 16:00:15 +0100 |
| commit | 9e4703df3aa9829a84d6ccf19c6062ba19a8de71 (patch) | |
| tree | ceb3c9d5b61e1710ef4f4eb97e1b60c88d594414 /drivers/mmc | |
| parent | a599579ee8e32daebdfa4d97b24389c680ef5789 (diff) | |
| download | talos-obmc-linux-9e4703df3aa9829a84d6ccf19c6062ba19a8de71.tar.gz talos-obmc-linux-9e4703df3aa9829a84d6ccf19c6062ba19a8de71.zip | |
mmc: sdhci-of-esdhc: avoid writing power control register
The eSDHC doesn't have a standard power control register, so when
writing this register in stack we should do nothing to avoid
incorrect operation.
Signed-off-by: Yangbo Lu <yangbo.lu@freescale.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/host/sdhci-of-esdhc.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/mmc/host/sdhci-of-esdhc.c b/drivers/mmc/host/sdhci-of-esdhc.c index 7b9282b6eac9..90e94a028a49 100644 --- a/drivers/mmc/host/sdhci-of-esdhc.c +++ b/drivers/mmc/host/sdhci-of-esdhc.c @@ -183,6 +183,12 @@ static u32 esdhc_writeb_fixup(struct sdhci_host *host, int shift = (spec_reg & 0x3) * 8; /* + * eSDHC doesn't have a standard power control register, so we do + * nothing here to avoid incorrect operation. + */ + if (spec_reg == SDHCI_POWER_CONTROL) + return old_value; + /* * "DMA select" location is offset 0x28 in SD specification, but on * P5020 or P3041, it's located at 0x29. */ |
